US20070246407A1 - Inflow control devices for sand control screens - Google Patents
Inflow control devices for sand control screens Download PDFInfo
- Publication number
- US20070246407A1 US20070246407A1 US11/409,734 US40973406A US2007246407A1 US 20070246407 A1 US20070246407 A1 US 20070246407A1 US 40973406 A US40973406 A US 40973406A US 2007246407 A1 US2007246407 A1 US 2007246407A1
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- Prior art keywords
- flow
- restrictors
- well screen
- inflow control
- control device
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Definitions
- the present invention relates generally to equipment utilized and operations performed in conjunction with subterranean wells and, in an embodiment described herein, more particularly provides inflow control devices for sand control screens.
- Certain well installations benefit from having a flow restriction device in a well screen.
- flow restriction devices have been useful in preventing water coning, balancing production from long horizontal intervals, etc.
- flow restriction devices are sometimes referred to as “inflow control devices.”
- a well screen and associated inflow control device which solves at least one problem in the art.
- the inflow control device includes a flow restrictor which is conveniently accessible just prior to installing the screen.
- multiple flow restrictors are configured and positioned to provide enhanced flow restriction.
- a well screen which includes a filter portion. At least two flow restrictors are configured in series, so that fluid which flows through the filter portion must flow through each of the flow restrictors.
- the well screen includes at least two tubular flow restrictors configured in series.
- the flow restrictors are positioned so that fluid which flows through the filter portion must reverse direction at least twice to flow between the flow restrictors.
- a method of installing a well screen includes the steps of: providing the well screen including a filter portion and an inflow control device with at least one flow restrictor which restricts flow of fluid through the filter portion; and accessing the flow restrictor by removing a portion of the inflow control device.
- FIG. 1 is a schematic partially cross-sectional view of a well system embodying principles of the present invention
- FIG. 2 is an enlarged scale cross-sectional view of a well screen which may be used in the system of FIG. 1 , the well screen including an inflow control device embodying principles of the present invention;
- FIG. 3 is a further enlarged scale cross-sectional view of a first alternate construction of the inflow control device
- FIG. 4 is a cross-sectional view of the inflow control device, taken along line 4 - 4 of FIG. 3 ;
- FIG. 5 is a cross-sectional view of a second alternate construction of the inflow control device
- FIG. 6 is a cross-sectional view of a third alternate construction of the inflow control device.
- FIG. 7 is a cross-sectional view of a fourth alternate construction of the inflow control device.
- FIG. 8 is a cross-sectional view of a fifth alternate construction of the inflow control device.
- FIG. 9 is a cross-sectional view of the inflow control device, taken along line 9 - 9 of FIG. 8 ;
- FIG. 10 is a cross-sectional view of a sixth alternate construction of the inflow control device, with the inflow control device being accessed;
- FIG. 11 is a cross-sectional view of the sixth alternate construction of the inflow control device, with the inflow control device being fully installed;
- FIG. 12 is a cross-sectional view of a seventh alternate construction of the inflow control device.
- FIG. 13 is a cross-sectional view of an eighth alternate construction of the inflow control device.
- FIG. 14 is a cross-sectional view of a ninth alternate construction of the inflow control device.
- FIG. 1 Representatively illustrated in FIG. 1 is a well system 10 which embodies principles of the present invention.
- a production tubing string 12 is installed in a wellbore 14 of a well.
- the tubing string 12 includes multiple well screens 16 positioned in an uncased generally horizontal portion of the wellbore 14 .
- One or more of the well screens 16 may be positioned in an isolated portion of the wellbore 14 , for example, between packers 18 set in the wellbore. In addition, or alternatively, many of the well screens 16 could be positioned in a long, continuous portion of the wellbore 14 , without packers isolating the wellbore between the screens.
- Gravel packs could be provided about any or all of the well screens 16 , if desired.
- a variety of additional well equipment (such as valves, sensors, pumps, control and actuation devices, etc.) could also be provided in the well system 10 .
- the well system 10 is merely representative of one well system in which the principles of the invention may be beneficially utilized.
- the invention is not limited in any manner to the details of the well system 10 described herein.
- the screens 16 could instead be positioned in a cased and perforated portion of a wellbore, the screens could be positioned in a generally vertical portion of a wellbore, the screens could be used in an injection well, rather than in a production well, etc.
- FIG. 2 an enlarged scale schematic cross-sectional view of the screen 16 is representatively illustrated.
- the well screen 16 may be used in the well system 10 , or it may be used in any other well system in keeping with the principles of the invention.
- the filter portion 26 is depicted in FIG. 2 as being made up of wire wraps, but other types of filter material (such as mesh, sintered material, pre-packed granular material, etc.) may be used in other embodiments.
- the fluid 32 enters an annular space 28 between the filter portion 26 and a tubular base pipe 90 of the screen 14 .
- the fluid 32 then passes through an inflow control device 34 , and into a flow passage 42 extending longitudinally through the screen 16 .
- the flow passage 42 is a part of a flow passage extending through the tubing string.
- flow passage 42 is depicted in FIG. 1 and others of the drawings as extending internally through the filter portion 26 , it will be appreciated that other configurations are possible in keeping with the principles of the invention.
- the flow passage could be external to the filter portion, in an outer shroud of the screen 16 , etc.
- the inflow control device 34 includes one or more flow restrictors 40 (only one of which is visible in FIG. 2 ) to restrict inward flow through the screen 16 (i.e., between the filter portion 26 and the flow passage 42 ).
- the flow restrictor 40 is in the shape of an elongated tube. A length, inner diameter and other characteristics of the tube may be varied to thereby vary the restriction to flow of the fluid 32 through the tube.
- the inflow control device 34 is described herein as being used to restrict flow of fluid from the filter portion 26 to the flow passage 42 , it will be appreciated that other configurations are possible in keeping with the principles of the invention. For example, if the flow passage is external to the filter portion 26 , then the inflow control device could restrict flow of fluid from the flow passage to the filter portion, etc.
- One advantage to using a tube for the flow restrictor 40 is that a larger inner diameter may be used to produce a restriction to flow which is equivalent to that produced by an orifice or nozzle with a smaller diameter passage.
- the larger inner diameter will not plug as easily as the smaller diameter passage.
- the extended length of the tube causes any erosion to be distributed over a larger surface area.
- an orifice or nozzle could be used in place of a tube for the flow restrictor 40 , if desired.
- the flow restrictor 40 is accessible via an opening 20 formed in an end wall 22 of the inflow control device 34 .
- a plug 44 is shown in FIG. 2 blocking flow through the opening 20 .
- the opening 20 in the end wall 22 of the inflow control device 34 provides convenient access to the flow restrictor 40 at a jobsite.
- the appropriate flow restrictor 40 may be selected (e.g., having an appropriate inner diameter, length and other characteristics to produce a desired flow restriction or pressure drop) and installed in the inflow control device 34 through the opening 20 .
- FIG. 3 an enlarged scale schematic cross-sectional view of an alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 as depicted in FIG. 3 may be used in the well screen 16 , or it may be used in other well screens in keeping with the principles of the invention.
- the inflow control device 34 includes multiple flow restrictors 24 , 30 configured in series.
- the flow restrictors 24 , 30 are in the shape of elongated tubes, similar to the flow restrictor 40 described above. However, in the embodiment of FIG. 3 , the flow restrictors 24 , 30 are positioned so that the fluid 32 must change direction twice in order to flow between the flow restrictors.
- FIG. 4 Another cross-sectional view of the inflow control device 34 is illustrated in FIG. 4 .
- the cross-sectional view is of a portion of the inflow control device 34 as if it were “unrolled,” i.e., FIG. 4 is a circumferential development of the cross-section.
- the manner in which the flow restrictors 24 , 30 are arranged in the device 34 to cause the fluid 32 to change direction may be clearly seen.
- the flow restrictors 24 , 30 extend into a central chamber 36 . Ends 38 , 43 of the flow restrictors 24 , 30 extend in opposite directions, and the flow restrictors overlap laterally, so that the fluid 32 is forced to reverse direction twice in flowing between the flow restrictors.
- the fluid 32 flows into the flow restrictors 30 which are installed in a bulkhead 46 . Any means of sealing and securing the flow restrictors 30 in the bulkhead 46 may be used.
- the flow restrictors 30 restrict the flow of the fluid 32 , so that a pressure drop results between the annular space 28 and the chamber 36 .
- the pressure drop between the annular space 28 and the chamber 36 may be adjusted by varying the number of the flow restrictors 30 , varying the inner diameter, length and other characteristics of the flow restrictors, replacing a certain number of the flow restrictors with plugs, replacing some or all of the flow restrictors with orifices or nozzles, not installing some or all of the flow restrictors (i.e., thereby leaving a relatively large opening in the bulkhead 46 ), etc. Although four of the flow restrictors 30 are depicted in FIG. 4 , any appropriate number may be used in practice.
- the flow restrictors 24 , 30 may be conveniently accessed and installed or removed by removing an outer housing 48 of the device 34 (see FIG. 3 ).
- a snap ring or other securement 50 may be used to provide convenient removal and installation of the outer housing 48 , thereby allowing the flow restrictors 24 , 30 to be accessed at a jobsite.
- openings and plugs (such as the opening 20 and plug 44 described above) could be provided in the end wall 22 for access to the flow restrictors 24 , 30 .
- the fluid 32 After the fluid 32 flows out of the ends 43 of the flow restrictors 30 , the fluid enters the chamber 36 . Since the ends 38 , 43 of the flow restrictors 24 , 30 overlap, the fluid 32 is forced to reverse direction twice before entering the ends 38 of the flow restrictors 24 . These abrupt changes in direction cause turbulence in the flow of the fluid 32 and result in a further pressure drop between the flow restrictors 24 , 30 . This pressure drop is uniquely achieved without the use of small passages which might become plugged or eroded over time.
- the restriction to flow through the flow restrictors 24 may be altered by varying the length, inner diameter, and other characteristics of the flow restrictors.
- a pressure drop is experienced between the chamber 36 and another chamber 52 on an opposite side of a bulkhead 54 in which the flow restrictors 24 are installed. Any method may be used to seal and secure the flow restrictors 24 in the bulkhead 54 , such as threads and seals, etc.
- the configuration of the inflow control device 34 as shown in FIGS. 3 & 4 and described above provides a desirable and adjustable total pressure drop between the annular space 28 and the flow passage 42 without requiring very small passages in orifices (although these could be used if desired), and also provides convenient access to the flow restrictors 24 , 30 at a jobsite.
- the flow restrictors 24 , 30 have been described above as being in the shape of tubes, it should be understood that other types and combinations of flow restrictors may be used in keeping with the principles of the invention.
- FIG. 5 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 as depicted in FIG. 5 may be used in the well screen 16 , or it may be used in other well screens in keeping with the principles of the invention.
- the inflow control device 34 of FIG. 5 utilizes a series of flow restrictors 58 , 60 , 62 in bulkheads 46 , 54 , 64 separating the annular space 28 and chambers 52 , 66 , 68 .
- the flow restrictors 58 , 60 , 62 are in the form of nozzles or orifices in the bulkheads 46 , 54 , 64 . Although only one flow restrictor 58 , 60 , 62 is visible in each of the respective bulkheads 46 , 54 , 64 , any number of orifices may be used in any of the bulkheads as appropriate to produce corresponding desired pressure drops.
- the inner diameter and other characteristics of the flow restrictors 58 , 60 , 62 may also be changed as desired to vary the restriction to flow through the orifices.
- the flow restrictors 58 , 60 , 62 are depicted in FIG. 5 as being integrally formed in the respective bulkheads 46 , 54 , 64 , but it will be appreciated that the orifices could instead be formed on separate members, such as threaded members which are screwed into and sealed to the bulkheads 46 , 54 , 64 .
- the flow restrictors 58 , 60 , 62 are formed on separate members, then they may be provided with different characteristics (such as different inner diameters, etc.) to thereby allow a variety of selectable pressure drops between the annular space 28 and the chambers 52 , 66 , 68 in succession.
- any of the flow restrictors 58 , 60 , 62 could be left out of its respective bulkhead 46 , 54 , 64 to provide a relatively large opening in the bulkhead (to produce a reduced pressure drop across the bulkhead), or a plug may be installed in place of any orifice (to produce an increased pressure drop across the bulkhead).
- the flow restrictors 58 , 60 , 62 may be accessed by removing the outer housing 48 .
- openings and plugs (such as the opening 20 and plug 44 described above) may be provided in the end wall 22 to access the flow restrictors 58 , 60 , 62 . In this manner, the flow restrictors 58 , 60 , 62 may be conveniently installed and otherwise accessed at a jobsite.
- the flow restrictors 58 , 60 , 62 are configured in series, so that the fluid 32 must flow through each of the orifices in succession. This produces a pressure drop across each of the bulkheads 46 , 54 , 64 . Although the flow restrictors 58 , 60 , 62 are depicted in FIG. 5 as being aligned longitudinally, they could instead be laterally offset from one another if desired to produce additional turbulence in the fluid 32 and corresponding additional pressure drops.
- FIG. 6 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 as depicted in FIG. 6 may be used in the well screen 16 , or it may be used in other well screens in keeping with the principles of the invention.
- the inflow control device 34 of FIG. 6 differs in at least one substantial respect from the inflow control device of FIG. 5 , in that the orifice flow restrictor 60 is replaced by the tubular flow restrictor 24 .
- the alternate construction of FIG. 6 demonstrates that any combination of flow restrictors may be used in keeping with the principles of the invention.
- the flow restrictors 58 , 24 , 62 are still configured in series, so that the fluid 32 must flow through each of the flow restrictors in succession. Although the flow restrictors 58 , 24 , 62 are depicted in FIG. 6 as being aligned longitudinally, they could instead be laterally offset from one another if desired to produce additional turbulence in the fluid 32 and corresponding additional pressure drops.
- FIG. 7 another alternate configuration of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 as depicted in FIG. 7 may be used in the well screen 16 , or it may be used in other well screens in keeping with the principles of the invention.
- the inflow control device 34 of FIG. 7 differs in substantial part from those described above, in that it includes a manifold 70 having multiple flow restrictors 72 , 74 and a chamber 76 formed therein.
- the manifold 70 is positioned between the chambers 52 , 68 in the inflow control device 34 .
- the fluid 32 flows in one direction through the flow restrictor 72 (from the chamber 68 to the chamber 52 ), and the fluid flows in an opposite direction through the flow restrictor 74 (from the chamber 52 to the chamber 76 ). Furthermore, the fluid 32 reverses direction in the chamber 52 (between the flow restrictors 72 , 74 ) and again changes direction in flowing from the chamber 76 and through the passage 42 via the opening 56 .
- pressure drops are caused by the restrictions to flow presented by the flow restrictors 58 , 72 , 74 .
- the flow restrictors 58 , 72 , 74 are configured in series, so that the fluid 32 must flow through each of the flow restrictors in succession.
- any number of the flow restrictors 58 , 72 , 74 may be used. Although the flow restrictors 72 , 74 are depicted in FIG. 7 as being integrally formed in the manifold 70 , the flow restrictors could instead be formed in separate members installed in the manifold.
- the flow restrictors 72 , 74 are formed on separate members, then they may be provided with different characteristics (such as different inner diameters, etc.) to thereby allow a variety of selectable pressure drops between the chambers 52 , 68 and the chambers 52 , 76 in succession.
- any of the flow restrictors 72 , 74 could be left out of the manifold 70 to provide a relatively large opening in the manifold (to produce a reduced pressure drop across the manifold), or a plug may be installed in place of any flow restrictor (to produce an increased pressure drop across the manifold).
- the manifold 70 and its flow restrictors 72 , 74 may be conveniently installed or accessed by removing the outer housing 48 .
- any of the flow restrictors 58 , 72 , 74 are formed on separate members, they may be installed or accessed through openings and plugs (such as the opening 20 and plug 44 described above) in the end wall 22 .
- FIG. 8 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 as depicted in FIG. 8 may be used in the well screen 16 , or it may be used in other well screens in keeping with the principles of the invention.
- the inflow control device 34 of FIG. 8 is similar in many respects to the configuration of FIGS. 3 & 4 , but differs in at least one substantial respect in that it includes the flow restrictors 58 and multiple channels 78 in place of the flow restrictors 30 .
- the arrangement of the channels 78 in relation to the flow restrictors 24 may be viewed more clearly in the cross-section of FIG. 9 .
- FIGS. 8 & 9 provides many of the same benefits as the configuration of FIGS. 3 & 4 .
- the channels 78 create turbulence in the fluid 32 in the chamber 36 and thereby provide a corresponding pressure drop between the flow restrictors 58 and the flow restrictors 24 .
- FIG. 10 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 of FIG. 10 may be used in the well screen 16 , or it may be used in other screens in keeping with the principles of the invention.
- the configuration of the inflow control device 34 as depicted in FIG. 10 differs from the other configurations described above in at least one substantial respect, in that it includes a flow restrictor 80 which is externally positioned in the device. That is, the flow restrictor 80 is not contained within an outer housing or chamber of the inflow control device 34 .
- the flow restrictor 80 is formed in a tubular member 82 which is sealingly and reciprocably received in a bore 84 formed in a housing 86 .
- the housing 86 is illustrated in FIG. 10 as being attached to the bulkhead 46 (for example, by welding, etc.), but it will be appreciated that the housing 86 and bulkhead 46 could be integrally formed, and that other arrangements of these elements could be constructed, in keeping with the principles of the invention.
- the member 82 has been inserted into the housing 86 sufficiently far so that a receiving device 88 can be installed.
- the receiving device 88 may be installed in the base pipe 90 of the well screen 16 using threads, seals or any other means of securing and sealing the receiving device to the base pipe.
- the receiving device 88 has a bore 92 and a passage 94 formed therein.
- the bore 92 is for sealingly receiving the tubular member 82 therein, and the passage 94 provides fluid communication between the bore and the flow passage 42 .
- the appropriate tubular member 82 with an appropriate flow restrictor 80 therein may be inserted into the housing 86 , and then the device 88 may be installed in the base pipe 90 .
- the flow restrictor 80 may be varied (for example, by changing an inner diameter or other characteristic of the flow restrictor) to provide a variety of restrictions to flow and pressure drops.
- the flow restrictor 80 may be formed in a separate member which is then installed (for example, by threading) in the tubular member 82 .
- FIG. 11 the tubular member 82 has been displaced upward, so that it is now sealingly received in the bore 92 of the receiving device 88 .
- a snap ring 96 is then received in a recess 98 formed on the tubular member 82 to maintain the member 82 in this position.
- the snap ring 96 may be withdrawn from the recess 98 , and then the tubular member may be displaced downward in the bore 84 of the housing 86 .
- the receiving device 88 may then be detached from the base pipe 90 and the tubular member 82 may be withdrawn from the housing 86 .
- the fluid 32 flows through the flow restrictor 80 in the tubular member 82 , thereby producing a pressure drop between the annular space 28 and the flow passage 42 .
- multiple flow restrictors 80 are provided for in the inflow control device 34 , then one or more of these may be replaced by a plug (e.g., by providing a tubular member 82 without the flow restrictor 80 formed therein) if desired to provide increased restriction to flow and a corresponding increased pressure drop between the annular space 28 and the flow passage 42 .
- FIG. 12 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 of FIG. 12 may be used in the well screen 16 , or it may be used in other well screens in keeping with the principles of the invention.
- the inflow control device 34 differs from the other inflow control devices described above in at least one substantial respect, in that it includes a flow restrictor 100 which is installed in the base pipe 90 .
- the flow restrictor 100 provides fluid communication between the flow passage 42 and a chamber 102 within a housing assembly 104 of the inflow control device 34 .
- Each flow restrictor 100 may be formed in a separate member 106 installed in the base pipe 90 (for example, using threads and seals, etc.).
- any of the members 106 may be replaced by a plug to increase the pressure drop between the chamber 102 and the flow passage 42 .
- one or more of the members 106 may be left out to thereby provide a relatively large opening between the chamber 102 and the flow passage 42 , and to thereby reduce the pressure drop.
- the member 106 may be conveniently accessed by removing the housing assembly 104 .
- the housing assembly 104 may include multiple housing members 108 , 110 with a compression seal 112 between the housing members.
- the housing members 108 , 110 are drawn together (for example, using threads, etc.) to thereby compress the seal 112 between the housing members and seal between the housing assembly and the base pipe 90 .
- FIG. 13 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 of FIG. 13 may be used in the well screen 16 , or it may be used in other screens in keeping with the principles of the invention.
- the inflow control device 34 as depicted in FIG. 13 is similar in many respects to the inflow control device of FIG. 5 . However, one substantial difference between these inflow control devices 34 is that the device of FIG. 13 includes flow blocking members 114 , 116 in the form of balls. Of course, other types of flow blocking members may be used, if desired.
- the inflow control device 34 of FIG. 13 includes flow restrictors 118 , 120 , 122 which provide fluid communication between the flow passage 42 and the respective chambers 52 , 66 , 68 .
- Any number of the flow restrictors 118 , 120 , 122 may be provided, and the flow restrictors may be formed directly in the base pipe 90 , or they may be formed in separate members (such as the member 106 described above), and they may be conveniently installed or accessed by removal of the outer housing 48 .
- the members 114 , 116 are preferably neutrally buoyant in water and, thus, are more dense than hydrocarbon fluid.
- the members 114 , 116 may have a density which is between that of water and hydrocarbon fluid, so that they become buoyant when the fluid 32 contains a certain selected proportion of water.
- the members 114 , 116 may have the same buoyancy.
- the member 114 may be designed to be buoyant in the fluid 32 when it has a certain proportion of water
- the member 116 may be designed to be buoyant in the fluid having another proportion of water.
- flow through the inflow control device 34 may be increasingly restricted as the proportion of water in the fluid 32 increases. This will operate to reduce the proportion of water produced in the well system 10 .
- the number of members 116 in the chamber 68 may be less than the number of flow restrictors 60 , 122 , so that no matter the composition of the fluid 32 , some flow will still be permitted between the chambers 66 , 68 , or between the chamber 68 and the flow passage 42 .
- the number of members 116 may be equal to, or greater than, the number of flow restrictors 60 , 122 , so that flow from the chamber 68 to the chamber 66 or to the flow passage 42 may be completely prevented.
- the member 114 is blocking flow through the flow restrictor 120 and the member 116 is blocking flow through the flow restrictor 122 , so that the fluid 32 is forced to flow from the chamber 68 , through the flow restrictor 60 , then through the chamber 66 , then through the flow restrictor 62 , then through the chamber 52 , and then through the flow restrictor 118 and into the flow passage 42 .
- the member 116 could alternatively (or in addition, if multiple members 116 are provided) block flow through the flow restrictor 60 , thereby forcing the fluid 32 to flow from the chamber 68 through the flow restrictor 122 and into the flow passage 42 .
- the member 114 could alternatively (or in addition, if multiple members 114 are provided) block flow through the flow restrictor 62 , thereby forcing the fluid 32 to flow from the chamber 66 through the flow restrictor 120 and into the flow passage 42 .
- flow restrictors 58 , 60 , 62 , 118 , 120 , 122 illustrated in FIG. 13 it is not necessary for the specific combination of flow restrictors 58 , 60 , 62 , 118 , 120 , 122 illustrated in FIG. 13 to be provided in the inflow control device 34 .
- any of the flow restrictors 118 , 120 , 122 could be eliminated (e.g., by replacing them with plugs, or simply not providing for them, etc.) and either of the members 114 , 116 could be used just for blocking flow through the flow restrictors 60 , 62 .
- the flow restrictor 118 could be replaced by the opening 56 described above, which would provide relatively unrestricted flow of the fluid 32 between the chamber 52 and the flow passage 42 .
- flow blocking members 114 , 116 illustrated in FIG. 13 it is also not necessary of the specific combination of flow blocking members 114 , 116 illustrated in FIG. 13 to be provided.
- either of the members 114 , 116 could be eliminated.
- one or more additional flow blocking members could be provided in the chamber 52 to selectively block flow through the flow restrictor 118 .
- FIG. 14 another alternate construction of the inflow control device 34 is representatively illustrated.
- the inflow control device 34 of FIG. 14 may be used in the well screen 16 , or it may be used in other screens in keeping with the principles of the invention.
- the inflow control device 34 as depicted in FIG. 14 is similar in many respects to the inflow control device of FIG. 6 , at least in part because it includes the flow restrictor 24 installed in the bulkhead 64 .
- the inflow control device 34 of FIG. 14 is also similar to the device of FIG. 13 , in that it includes the flow blocking members 114 , 116 in the respective chambers 66 , 68 .
- the flow restrictor 122 is not provided in the inflow control device 34 of FIG. 14 .
- the member 116 only blocks flow through the flow restrictor 24 .
- the member 116 is blocking flow through the flow restrictor 24 . If multiple flow restrictors 24 are installed in the bulkhead 64 , and the number of members 116 is less than the number of restrictors, then flow may still be permitted between the chambers 66 , 68 via the unblocked restrictors.
- any combination of the flow restrictors 58 , 62 , 24 , 118 , 120 , 122 and flow blocking members 114 , 116 may be used, any number (and any relative numbers) of these elements may be used, the flow blocking members may be used in any (and any combination) of the chambers 52 , 66 , 68 , and any combination of densities of the flow blocking members may be used, without departing from the principles of the invention.
- any of the flow restrictors 24 , 30 , 40 , 58 , 60 , 62 , 72 , 74 , 78 , 80 , 100 , 118 , 120 , 122 described above could be replaced with, or could incorporate, a helical flowpath or other type of tortuous flowpath, such as those described in U.S. Pat. No. 6,112,815, the entire disclosure of which is incorporated herein by this reference.
Abstract
Description
- The present invention relates generally to equipment utilized and operations performed in conjunction with subterranean wells and, in an embodiment described herein, more particularly provides inflow control devices for sand control screens.
- Certain well installations benefit from having a flow restriction device in a well screen. For example, such flow restriction devices have been useful in preventing water coning, balancing production from long horizontal intervals, etc. These flow restriction devices are sometimes referred to as “inflow control devices.”
- Unfortunately, typical inflow control devices rely on very small passages in orifices or nozzles to restrict flow, and typical inflow control devices cannot be conveniently adjusted at a jobsite, or are at least difficult to adjust. Small orifice passages are easily plugged, and the large pressure drop across an orifice tends to erode the passage relatively quickly. Convenient adjustment of the inflow control device at the jobsite is desirable, since exact well conditions and desired production parameters may not be known beforehand, and it is impractical to manufacture and warehouse well screens with inflow control devices configured for all possible conditions.
- Therefore, it may be seen that improvements are needed in the art of well screens having inflow control devices. It is among the objects of the present invention to provide such improvements.
- In carrying out the principles of the present invention, a well screen and associated inflow control device is provided which solves at least one problem in the art. One example is described below in which the inflow control device includes a flow restrictor which is conveniently accessible just prior to installing the screen. Another example is described below in which multiple flow restrictors are configured and positioned to provide enhanced flow restriction.
- In one aspect of the invention, a well screen is provided which includes a filter portion. At least two flow restrictors are configured in series, so that fluid which flows through the filter portion must flow through each of the flow restrictors.
- In another aspect of the invention, the well screen includes at least two tubular flow restrictors configured in series. The flow restrictors are positioned so that fluid which flows through the filter portion must reverse direction at least twice to flow between the flow restrictors.
- In another aspect of the invention, a method of installing a well screen includes the steps of: providing the well screen including a filter portion and an inflow control device with at least one flow restrictor which restricts flow of fluid through the filter portion; and accessing the flow restrictor by removing a portion of the inflow control device.
- These and other features, advantages, benefits and objects of the present invention will become apparent to one of ordinary skill in the art upon careful consideration of the detailed description of representative embodiments of the invention hereinbelow and the accompanying drawings, in which similar elements are indicated in the various figures using the same reference numbers.
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FIG. 1 is a schematic partially cross-sectional view of a well system embodying principles of the present invention; -
FIG. 2 is an enlarged scale cross-sectional view of a well screen which may be used in the system ofFIG. 1 , the well screen including an inflow control device embodying principles of the present invention; -
FIG. 3 is a further enlarged scale cross-sectional view of a first alternate construction of the inflow control device; -
FIG. 4 is a cross-sectional view of the inflow control device, taken along line 4-4 ofFIG. 3 ; -
FIG. 5 is a cross-sectional view of a second alternate construction of the inflow control device; -
FIG. 6 is a cross-sectional view of a third alternate construction of the inflow control device; -
FIG. 7 is a cross-sectional view of a fourth alternate construction of the inflow control device; -
FIG. 8 is a cross-sectional view of a fifth alternate construction of the inflow control device; -
FIG. 9 is a cross-sectional view of the inflow control device, taken along line 9-9 ofFIG. 8 ; -
FIG. 10 is a cross-sectional view of a sixth alternate construction of the inflow control device, with the inflow control device being accessed; -
FIG. 11 is a cross-sectional view of the sixth alternate construction of the inflow control device, with the inflow control device being fully installed; -
FIG. 12 is a cross-sectional view of a seventh alternate construction of the inflow control device; -
FIG. 13 is a cross-sectional view of an eighth alternate construction of the inflow control device; and -
FIG. 14 is a cross-sectional view of a ninth alternate construction of the inflow control device. - It is to be understood that the various embodiments of the present invention described herein may be utilized in various orientations, such as inclined, inverted, horizontal, vertical, etc., and in various configurations, without departing from the principles of the present invention. The embodiments are described merely as examples of useful applications of the principles of the invention, which is not limited to any specific details of these embodiments.
- In the following description of the representative embodiments of the invention, directional terms, such as “above”, “below”, “upper”, “lower”, etc., are used for convenience in referring to the accompanying drawings. In general, “above”, “upper”, “upward” and similar terms refer to a direction toward the earth's surface along a wellbore, and “below”, “lower”, “downward” and similar terms refer to a direction away from the earth's surface along the wellbore.
- Representatively illustrated in
FIG. 1 is awell system 10 which embodies principles of the present invention. Aproduction tubing string 12 is installed in awellbore 14 of a well. Thetubing string 12 includesmultiple well screens 16 positioned in an uncased generally horizontal portion of thewellbore 14. - One or more of the
well screens 16 may be positioned in an isolated portion of thewellbore 14, for example, betweenpackers 18 set in the wellbore. In addition, or alternatively, many of thewell screens 16 could be positioned in a long, continuous portion of thewellbore 14, without packers isolating the wellbore between the screens. - Gravel packs could be provided about any or all of the
well screens 16, if desired. A variety of additional well equipment (such as valves, sensors, pumps, control and actuation devices, etc.) could also be provided in thewell system 10. - It should be clearly understood that the
well system 10 is merely representative of one well system in which the principles of the invention may be beneficially utilized. However, the invention is not limited in any manner to the details of thewell system 10 described herein. For example, thescreens 16 could instead be positioned in a cased and perforated portion of a wellbore, the screens could be positioned in a generally vertical portion of a wellbore, the screens could be used in an injection well, rather than in a production well, etc. - Referring additionally now to
FIG. 2 , an enlarged scale schematic cross-sectional view of thescreen 16 is representatively illustrated. The wellscreen 16 may be used in thewell system 10, or it may be used in any other well system in keeping with the principles of the invention. - A
fluid 32 flows inwardly through afilter portion 26 of thescreen 16. Thefilter portion 26 is depicted inFIG. 2 as being made up of wire wraps, but other types of filter material (such as mesh, sintered material, pre-packed granular material, etc.) may be used in other embodiments. - The
fluid 32 enters anannular space 28 between thefilter portion 26 and atubular base pipe 90 of thescreen 14. Thefluid 32 then passes through aninflow control device 34, and into aflow passage 42 extending longitudinally through thescreen 16. When interconnected in thetubing string 12 in thewell system 10 ofFIG. 1 , theflow passage 42 is a part of a flow passage extending through the tubing string. - Although the
flow passage 42 is depicted inFIG. 1 and others of the drawings as extending internally through thefilter portion 26, it will be appreciated that other configurations are possible in keeping with the principles of the invention. For example, the flow passage could be external to the filter portion, in an outer shroud of thescreen 16, etc. - The
inflow control device 34 includes one or more flow restrictors 40 (only one of which is visible inFIG. 2 ) to restrict inward flow through the screen 16 (i.e., between thefilter portion 26 and the flow passage 42). As depicted inFIG. 2 , theflow restrictor 40 is in the shape of an elongated tube. A length, inner diameter and other characteristics of the tube may be varied to thereby vary the restriction to flow of thefluid 32 through the tube. - Although the
inflow control device 34 is described herein as being used to restrict flow of fluid from thefilter portion 26 to theflow passage 42, it will be appreciated that other configurations are possible in keeping with the principles of the invention. For example, if the flow passage is external to thefilter portion 26, then the inflow control device could restrict flow of fluid from the flow passage to the filter portion, etc. - One advantage to using a tube for the
flow restrictor 40 is that a larger inner diameter may be used to produce a restriction to flow which is equivalent to that produced by an orifice or nozzle with a smaller diameter passage. The larger inner diameter will not plug as easily as the smaller diameter passage. In addition, the extended length of the tube causes any erosion to be distributed over a larger surface area. However, an orifice or nozzle could be used in place of a tube for theflow restrictor 40, if desired. - In a beneficial feature of the
screen 16 as depicted inFIG. 2 , theflow restrictor 40 is accessible via anopening 20 formed in anend wall 22 of theinflow control device 34. Aplug 44 is shown inFIG. 2 blocking flow through theopening 20. - It will be appreciated that the
opening 20 in theend wall 22 of theinflow control device 34 provides convenient access to theflow restrictor 40 at a jobsite. When the well conditions and desired production parameters are known, theappropriate flow restrictor 40 may be selected (e.g., having an appropriate inner diameter, length and other characteristics to produce a desired flow restriction or pressure drop) and installed in theinflow control device 34 through theopening 20. - To install the
flow restrictor 40 in theinflow control device 34, appropriate threads, seals, etc. may be provided to secure and seal the flow restrictor. Theplug 44 is then installed in theopening 20 using appropriate threads, seals, etc. Note that any manner of sealing and securing theflow restrictor 40 and plug 44 may be used in keeping with the principles of the invention. - Referring additionally now to
FIG. 3 , an enlarged scale schematic cross-sectional view of an alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 as depicted inFIG. 3 may be used in thewell screen 16, or it may be used in other well screens in keeping with the principles of the invention. - The
inflow control device 34 includesmultiple flow restrictors flow restrictor 40 described above. However, in the embodiment ofFIG. 3 , theflow restrictors - Another cross-sectional view of the
inflow control device 34 is illustrated inFIG. 4 . The cross-sectional view is of a portion of theinflow control device 34 as if it were “unrolled,” i.e.,FIG. 4 is a circumferential development of the cross-section. - In this view, the manner in which the
flow restrictors device 34 to cause the fluid 32 to change direction may be clearly seen. The flow restrictors 24, 30 extend into acentral chamber 36. Ends 38, 43 of theflow restrictors - From the
annular space 28, the fluid 32 flows into theflow restrictors 30 which are installed in abulkhead 46. Any means of sealing and securing theflow restrictors 30 in thebulkhead 46 may be used. The flow restrictors 30 restrict the flow of the fluid 32, so that a pressure drop results between theannular space 28 and thechamber 36. - The pressure drop between the
annular space 28 and thechamber 36 may be adjusted by varying the number of theflow restrictors 30, varying the inner diameter, length and other characteristics of the flow restrictors, replacing a certain number of the flow restrictors with plugs, replacing some or all of the flow restrictors with orifices or nozzles, not installing some or all of the flow restrictors (i.e., thereby leaving a relatively large opening in the bulkhead 46), etc. Although four of theflow restrictors 30 are depicted inFIG. 4 , any appropriate number may be used in practice. - The flow restrictors 24, 30 may be conveniently accessed and installed or removed by removing an
outer housing 48 of the device 34 (seeFIG. 3 ). A snap ring orother securement 50 may be used to provide convenient removal and installation of theouter housing 48, thereby allowing theflow restrictors opening 20 and plug 44 described above) could be provided in theend wall 22 for access to theflow restrictors - After the fluid 32 flows out of the
ends 43 of theflow restrictors 30, the fluid enters thechamber 36. Since the ends 38, 43 of theflow restrictors ends 38 of theflow restrictors 24. These abrupt changes in direction cause turbulence in the flow of the fluid 32 and result in a further pressure drop between theflow restrictors - As the fluid 32 flows through the
flow restrictors 24, a further pressure drop results. As discussed above, the restriction to flow through theflow restrictors 24 may be altered by varying the length, inner diameter, and other characteristics of the flow restrictors. - Due to this flow restriction, a pressure drop is experienced between the
chamber 36 and anotherchamber 52 on an opposite side of abulkhead 54 in which theflow restrictors 24 are installed. Any method may be used to seal and secure theflow restrictors 24 in thebulkhead 54, such as threads and seals, etc. - When the fluid 32 enters the chamber, another change in direction is required for the fluid to flow toward
openings 56 which provide fluid communication between thechamber 52 and theflow passage 42. After flowing through theopenings 56, a further change in direction is required for the fluid 32 to flow through thepassage 42. Thus, another pressure drop is experienced between thechamber 52 and thepassage 42. - It will be readily appreciated by those skilled in the art that the configuration of the
inflow control device 34 as shown inFIGS. 3 & 4 and described above provides a desirable and adjustable total pressure drop between theannular space 28 and theflow passage 42 without requiring very small passages in orifices (although these could be used if desired), and also provides convenient access to theflow restrictors flow restrictors - Referring additionally now to
FIG. 5 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 as depicted inFIG. 5 may be used in thewell screen 16, or it may be used in other well screens in keeping with the principles of the invention. - Instead of the
tubular flow restrictors FIGS. 3 & 4 , theinflow control device 34 ofFIG. 5 utilizes a series offlow restrictors bulkheads annular space 28 andchambers bulkheads flow restrictor respective bulkheads - The inner diameter and other characteristics of the
flow restrictors FIG. 5 as being integrally formed in therespective bulkheads bulkheads - If the
flow restrictors annular space 28 and thechambers flow restrictors respective bulkhead - The flow restrictors 58, 60, 62 may be accessed by removing the
outer housing 48. Alternatively, openings and plugs (such as theopening 20 and plug 44 described above) may be provided in theend wall 22 to access theflow restrictors flow restrictors - The flow restrictors 58, 60, 62 are configured in series, so that the fluid 32 must flow through each of the orifices in succession. This produces a pressure drop across each of the
bulkheads flow restrictors FIG. 5 as being aligned longitudinally, they could instead be laterally offset from one another if desired to produce additional turbulence in the fluid 32 and corresponding additional pressure drops. - Referring additionally now to
FIG. 6 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 as depicted inFIG. 6 may be used in thewell screen 16, or it may be used in other well screens in keeping with the principles of the invention. - The
inflow control device 34 ofFIG. 6 differs in at least one substantial respect from the inflow control device ofFIG. 5 , in that theorifice flow restrictor 60 is replaced by thetubular flow restrictor 24. Thus, the alternate construction ofFIG. 6 demonstrates that any combination of flow restrictors may be used in keeping with the principles of the invention. - The flow restrictors 58, 24, 62 are still configured in series, so that the fluid 32 must flow through each of the flow restrictors in succession. Although the
flow restrictors FIG. 6 as being aligned longitudinally, they could instead be laterally offset from one another if desired to produce additional turbulence in the fluid 32 and corresponding additional pressure drops. - Referring additionally now to
FIG. 7 , another alternate configuration of theinflow control device 34 is representatively illustrated. Theinflow control device 34 as depicted inFIG. 7 may be used in thewell screen 16, or it may be used in other well screens in keeping with the principles of the invention. - The
inflow control device 34 ofFIG. 7 differs in substantial part from those described above, in that it includes a manifold 70 havingmultiple flow restrictors chamber 76 formed therein. The manifold 70 is positioned between thechambers inflow control device 34. - In one unique feature of the
inflow control device 34 ofFIG. 7 , the fluid 32 flows in one direction through the flow restrictor 72 (from thechamber 68 to the chamber 52), and the fluid flows in an opposite direction through the flow restrictor 74 (from thechamber 52 to the chamber 76). Furthermore, the fluid 32 reverses direction in the chamber 52 (between theflow restrictors 72, 74) and again changes direction in flowing from thechamber 76 and through thepassage 42 via theopening 56. - Turbulence and a corresponding pressure drop results from each of these changes in direction of flow of the fluid 32. In addition, pressure drops are caused by the restrictions to flow presented by the
flow restrictors - Any number of the
flow restrictors flow restrictors FIG. 7 as being integrally formed in the manifold 70, the flow restrictors could instead be formed in separate members installed in the manifold. - If the
flow restrictors chambers chambers flow restrictors - The manifold 70 and its
flow restrictors outer housing 48. Alternatively, if any of theflow restrictors opening 20 and plug 44 described above) in theend wall 22. - Referring additionally now to
FIG. 8 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 as depicted inFIG. 8 may be used in thewell screen 16, or it may be used in other well screens in keeping with the principles of the invention. - The
inflow control device 34 ofFIG. 8 is similar in many respects to the configuration ofFIGS. 3 & 4 , but differs in at least one substantial respect in that it includes theflow restrictors 58 andmultiple channels 78 in place of theflow restrictors 30. The arrangement of thechannels 78 in relation to theflow restrictors 24 may be viewed more clearly in the cross-section ofFIG. 9 . - The configuration of
FIGS. 8 & 9 provides many of the same benefits as the configuration ofFIGS. 3 & 4 . Thechannels 78 create turbulence in the fluid 32 in thechamber 36 and thereby provide a corresponding pressure drop between theflow restrictors 58 and theflow restrictors 24. - Referring additionally now to
FIG. 10 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 ofFIG. 10 may be used in thewell screen 16, or it may be used in other screens in keeping with the principles of the invention. - The configuration of the
inflow control device 34 as depicted inFIG. 10 differs from the other configurations described above in at least one substantial respect, in that it includes aflow restrictor 80 which is externally positioned in the device. That is, theflow restrictor 80 is not contained within an outer housing or chamber of theinflow control device 34. - Instead, the
flow restrictor 80 is formed in atubular member 82 which is sealingly and reciprocably received in abore 84 formed in ahousing 86. Thehousing 86 is illustrated inFIG. 10 as being attached to the bulkhead 46 (for example, by welding, etc.), but it will be appreciated that thehousing 86 andbulkhead 46 could be integrally formed, and that other arrangements of these elements could be constructed, in keeping with the principles of the invention. - As depicted in
FIG. 10 , themember 82 has been inserted into thehousing 86 sufficiently far so that a receivingdevice 88 can be installed. The receivingdevice 88 may be installed in thebase pipe 90 of thewell screen 16 using threads, seals or any other means of securing and sealing the receiving device to the base pipe. - The receiving
device 88 has abore 92 and apassage 94 formed therein. Thebore 92 is for sealingly receiving thetubular member 82 therein, and thepassage 94 provides fluid communication between the bore and theflow passage 42. - Thus, at a jobsite, when the well conditions and desired production characteristics are known, the
appropriate tubular member 82 with anappropriate flow restrictor 80 therein may be inserted into thehousing 86, and then thedevice 88 may be installed in thebase pipe 90. Any number of thetubular member 82 may be used, and theflow restrictor 80 may be varied (for example, by changing an inner diameter or other characteristic of the flow restrictor) to provide a variety of restrictions to flow and pressure drops. The flow restrictor 80 may be formed in a separate member which is then installed (for example, by threading) in thetubular member 82. - In
FIG. 11 , thetubular member 82 has been displaced upward, so that it is now sealingly received in thebore 92 of the receivingdevice 88. Asnap ring 96 is then received in arecess 98 formed on thetubular member 82 to maintain themember 82 in this position. - To remove the
tubular member 82, thesnap ring 96 may be withdrawn from therecess 98, and then the tubular member may be displaced downward in thebore 84 of thehousing 86. The receivingdevice 88 may then be detached from thebase pipe 90 and thetubular member 82 may be withdrawn from thehousing 86. - In use, the fluid 32 flows through the
flow restrictor 80 in thetubular member 82, thereby producing a pressure drop between theannular space 28 and theflow passage 42. Ifmultiple flow restrictors 80 are provided for in theinflow control device 34, then one or more of these may be replaced by a plug (e.g., by providing atubular member 82 without theflow restrictor 80 formed therein) if desired to provide increased restriction to flow and a corresponding increased pressure drop between theannular space 28 and theflow passage 42. - Referring additionally now to
FIG. 12 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 ofFIG. 12 may be used in thewell screen 16, or it may be used in other well screens in keeping with the principles of the invention. - The
inflow control device 34 differs from the other inflow control devices described above in at least one substantial respect, in that it includes aflow restrictor 100 which is installed in thebase pipe 90. The flow restrictor 100 provides fluid communication between theflow passage 42 and achamber 102 within ahousing assembly 104 of theinflow control device 34. - Any number of the
flow restrictors 100 may be provided. Eachflow restrictor 100 may be formed in aseparate member 106 installed in the base pipe 90 (for example, using threads and seals, etc.). - If
multiple flow restrictors 100 are provided for in theinflow control device 34, then any of themembers 106 may be replaced by a plug to increase the pressure drop between thechamber 102 and theflow passage 42. Alternatively, one or more of themembers 106 may be left out to thereby provide a relatively large opening between thechamber 102 and theflow passage 42, and to thereby reduce the pressure drop. - The
member 106 may be conveniently accessed by removing thehousing assembly 104. Thehousing assembly 104 may includemultiple housing members compression seal 112 between the housing members. When thehousing assembly 104 is installed after accessing or installing theflow restrictor 100, thehousing members seal 112 between the housing members and seal between the housing assembly and thebase pipe 90. - Referring additionally now to
FIG. 13 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 ofFIG. 13 may be used in thewell screen 16, or it may be used in other screens in keeping with the principles of the invention. - The
inflow control device 34 as depicted inFIG. 13 is similar in many respects to the inflow control device ofFIG. 5 . However, one substantial difference between theseinflow control devices 34 is that the device ofFIG. 13 includesflow blocking members - An example of flow blocking members which may be used for the
members - Another substantial difference is that the
inflow control device 34 ofFIG. 13 includesflow restrictors flow passage 42 and therespective chambers flow restrictors base pipe 90, or they may be formed in separate members (such as themember 106 described above), and they may be conveniently installed or accessed by removal of theouter housing 48. - The
members members - Note that it is not necessary for the
members member 114 may be designed to be buoyant in the fluid 32 when it has a certain proportion of water, and themember 116 may be designed to be buoyant in the fluid having another proportion of water. - In this manner, flow through the
inflow control device 34 may be increasingly restricted as the proportion of water in the fluid 32 increases. This will operate to reduce the proportion of water produced in thewell system 10. - If multiple
flow blocking members 114 are provided in thechamber 66, it is not necessary for all of the members to have the same density. Similarly, if multipleflow blocking members 116 are provided in thechamber 68 it is not necessary for all of the members to have the same buoyancy. This is another manner in which increased restriction to flow may be provided as the fluid 32 contains an increased proportion of water. - Various relationships between the number of
flow blocking members respective flow restrictors members 116 in thechamber 68 may be less than the number offlow restrictors chambers chamber 68 and theflow passage 42. As another example, the number ofmembers 116 may be equal to, or greater than, the number offlow restrictors chamber 68 to thechamber 66 or to theflow passage 42 may be completely prevented. - As depicted in
FIG. 13 , themember 114 is blocking flow through theflow restrictor 120 and themember 116 is blocking flow through theflow restrictor 122, so that the fluid 32 is forced to flow from thechamber 68, through theflow restrictor 60, then through thechamber 66, then through theflow restrictor 62, then through thechamber 52, and then through theflow restrictor 118 and into theflow passage 42. Themember 116 could alternatively (or in addition, ifmultiple members 116 are provided) block flow through theflow restrictor 60, thereby forcing the fluid 32 to flow from thechamber 68 through theflow restrictor 122 and into theflow passage 42. Similarly, themember 114 could alternatively (or in addition, ifmultiple members 114 are provided) block flow through theflow restrictor 62, thereby forcing the fluid 32 to flow from thechamber 66 through theflow restrictor 120 and into theflow passage 42. - Note that it is not necessary for the specific combination of
flow restrictors FIG. 13 to be provided in theinflow control device 34. For example, any of theflow restrictors members flow restrictors flow restrictor 118 could be replaced by theopening 56 described above, which would provide relatively unrestricted flow of the fluid 32 between thechamber 52 and theflow passage 42. - Note that it is also not necessary of the specific combination of
flow blocking members FIG. 13 to be provided. For example, either of themembers chamber 52 to selectively block flow through theflow restrictor 118. - Referring additionally now to
FIG. 14 , another alternate construction of theinflow control device 34 is representatively illustrated. Theinflow control device 34 ofFIG. 14 may be used in thewell screen 16, or it may be used in other screens in keeping with the principles of the invention. - The
inflow control device 34 as depicted inFIG. 14 is similar in many respects to the inflow control device ofFIG. 6 , at least in part because it includes theflow restrictor 24 installed in thebulkhead 64. Theinflow control device 34 ofFIG. 14 is also similar to the device ofFIG. 13 , in that it includes theflow blocking members respective chambers - However, note that the
flow restrictor 122 is not provided in theinflow control device 34 ofFIG. 14 . Thus, themember 116 only blocks flow through theflow restrictor 24. - As depicted in
FIG. 14 , themember 116 is blocking flow through theflow restrictor 24. Ifmultiple flow restrictors 24 are installed in thebulkhead 64, and the number ofmembers 116 is less than the number of restrictors, then flow may still be permitted between thechambers - Similar to the description above regarding the embodiment of the
inflow control device 34 illustrated inFIG. 13 , any combination of theflow restrictors members chambers - The various embodiments of the
inflow control device 34 depicted inFIGS. 2-14 and described above have demonstrated how the benefits of the present invention may be achieved in thewell screen 16. It should be clearly understood, however, that the invention is not limited to only these examples. For example, any of the flow restrictors, chambers, flow blocking members, openings, plugs, housings, manifolds, and other elements described above may be used in any of the embodiments, and any number and combination of these may be used, so that a vast number of combinations of elements are possible while still incorporating principles of the invention. - In addition, other elements (such as other types of flow restrictors, filter portions, etc.) may be substituted for those described above in keeping with the principles of the invention. For example, any of the
flow restrictors - Of course, a person skilled in the art would, upon a careful consideration of the above description of representative embodiments of the invention, readily appreciate that many modifications, additions, substitutions, deletions, and other changes may be made to these specific embodiments, and such changes are within the scope of the principles of the present invention. Accordingly, the foregoing detailed description is to be clearly understood as being given by way of illustration and example only, the spirit and scope of the present invention being limited solely by the appended claims and their equivalents.
Claims (21)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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US11/409,734 US7802621B2 (en) | 2006-04-24 | 2006-04-24 | Inflow control devices for sand control screens |
US11/668,024 US7469743B2 (en) | 2006-04-24 | 2007-01-29 | Inflow control devices for sand control screens |
NO20072038A NO20072038L (en) | 2006-04-24 | 2007-04-20 | Inflow control devices for sand control screens |
GB0707831A GB2437631B (en) | 2006-04-24 | 2007-04-23 | Inflow control devices for sand control screens |
GB1017925A GB2472336B (en) | 2006-04-24 | 2007-04-23 | Inflow control devices for sand control screens |
SG2011057155A SG174056A1 (en) | 2006-04-24 | 2007-04-24 | Inflow control devices for sand control screens |
SG200702987-9A SG136919A1 (en) | 2006-04-24 | 2007-04-24 | Inflow control devices for sand control screens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/409,734 US7802621B2 (en) | 2006-04-24 | 2006-04-24 | Inflow control devices for sand control screens |
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US11/668,024 Continuation-In-Part US7469743B2 (en) | 2006-04-24 | 2007-01-29 | Inflow control devices for sand control screens |
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US20070246407A1 true US20070246407A1 (en) | 2007-10-25 |
US7802621B2 US7802621B2 (en) | 2010-09-28 |
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US11/409,734 Active 2027-09-15 US7802621B2 (en) | 2006-04-24 | 2006-04-24 | Inflow control devices for sand control screens |
Country Status (4)
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US (1) | US7802621B2 (en) |
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Also Published As
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GB2472336B (en) | 2011-05-18 |
GB0707831D0 (en) | 2007-05-30 |
SG136919A1 (en) | 2007-11-29 |
NO20072038L (en) | 2007-10-25 |
GB2472336A (en) | 2011-02-02 |
US7802621B2 (en) | 2010-09-28 |
GB2437631B (en) | 2011-03-02 |
GB201017925D0 (en) | 2010-12-01 |
GB2437631A (en) | 2007-10-31 |
SG174056A1 (en) | 2011-09-29 |
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